public org.apache.maven.api.plugin.descriptor.MojoDescriptor getMojoDescriptorV4() {
        if (mojoDescriptorV4 == null) {
            synchronized (this) {
                if (mojoDescriptorV4 == null) {
                    mojoDescriptorV4 = org.apache.maven.api.plugin.descriptor.MojoDescriptor.newBuilder()
                            .goal(goal)

          }
        }
      }
    clientListener.setNextEventDelegate(reconnectOnFailure)
    webSockets.add(client.newWebSocket(request, clientListener))
    attempts.await()
    synchronized(webSockets) {
      for (webSocket in webSockets) {
        webSocket.cancel()
      }
    }
  }

  @Test
  @Throws(Exception::class)
  fun compressedMessages() {

                    }
                });
            }
            final CrawlingConfigHelper crawlingConfigHelper = ComponentUtil.getCrawlingConfigHelper();
            synchronized (searchEngineClient) {
                final long deletedDocCount = deleteOldDocuments(searchEngineClient, docList);
                if (logger.isDebugEnabled()) {

   * {@code ImmutableList.of(list)} returns an {@code ImmutableList<List<String>>} containing one
   * element (the given list itself).
   *
   * <p>This method is safe to use even when {@code elements} is a synchronized or concurrent
   * collection that is currently being modified by another thread.
   *
   * @throws NullPointerException if {@code elements} contains a null element
   */

     * @param javaName the name used by Java APIs for this cipher suite. Different than the IANA
     *     name for older cipher suites because the prefix is `SSL_` instead of `TLS_`.
     */
    @JvmStatic
    @Synchronized fun forJavaName(javaName: String): CipherSuite {
      var result: CipherSuite? = INSTANCES[javaName]
      if (result == null) {
        result = INSTANCES[secondaryName(javaName)]

        if (result == null) {

 * {@link #at}, {@link #set}, {@link #toArray}, {@link #rowKeyList}, and {@link #columnKeyList}
 * methods for more details.
 *
 * <p>Note that this implementation is not synchronized. If multiple threads access the same cell of
 * an {@code ArrayTable} concurrently and one of the threads modifies its value, there is no
 * guarantee that the new value will be fully visible to the other threads. To guarantee that

      } finally {
        add(newCloseables, directExecutor());
      }
    }

    @Override
    public void close() {
      if (closed) {
        return;
      }
      synchronized (this) {
        if (closed) {
          return;
        }
        closed = true;
      }
      for (Map.Entry<AutoCloseable, Executor> entry : entrySet()) {

        if (logger.isDebugEnabled()) {
            logger.debug("Registering searcher: {}", searcher.getClass().getSimpleName());
        }
        searchers.add(searcher);
        synchronized (this) {
            if (executorService == null) {
                int numThreads = ComponentUtil.getFessConfig().getRankFusionThreadsAsInteger();
                if (numThreads <= 0) {

import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicReference;
import org.jspecify.annotations.Nullable;

/**
 * Serializes execution of tasks, somewhat like an "asynchronous {@code synchronized} block." Each
 * {@linkplain #submit enqueued} callable will not be submitted to its associated executor until the
 * previous callable has returned -- and, if the previous callable was an {@link AsyncCallable}, not

            case 2:
                md4.update(ntHash);
                md4.digest(dest, offset, 16);
                break;
            case 3:
            case 4:
            case 5:
                synchronized (this) {
                    if (this.clientChallenge == null) {
                        this.clientChallenge = new byte[8];
                        tc.getConfig().getRandom().nextBytes(this.clientChallenge);